Hi hrtofgold, The best thing my husband did for me was to go along to the doctor visits and take careful note of everything the doctors said - I don't know how he did it, but he memorized what they said almost word for word.
So if I got down or depressed about treatment etc, then hubby would ask me exactly what was wrong. Whatever I said, he was able to counter with "Yes but remember what Dr X told you about this...." He used the doctor's exact words to help me remember. It got to be a routine everytime I got short of breath or tired out. And it helped.
I hope your boyfriend's treatments go well.
Barb